Recently,StateIntellectualPropertyOfficeofChinaauthorizedaninventionpatenttoaproject'SelfflowingCastablesforFillingBackJointsofAluminumElectrolyticCellSideWall'ofSinosteelRefractoryCo.,Ltd.Thispatentinvolvesonekindofself-flowingcastablesforfillingthejointsbetweenshellandsidewall